The emotional undertow of aging, I think, is a feeling of loss — Loss of youth, loss of dreams, loss of possibility.This quality is what used to be referred to as mid-life crisis. Other phrases have come into vogue now — such as the cheery “60 is the new 40″ — but the undertow of such homilies is still loss. Is there some way out of this sense of loss, some fresh point of view that assuages the pain of it? Actually, there is. Aging is not a matter of years — forty, sixty, eighty — but of life process. Everything is aging, all the time. We age from our first breath. The problem is not aging per se,